Henry f



H. F. BECHMAN.

BLANKET CYLINDER FOR PRINTING PRESSES.

` APPLICATION FILED JUNE 13. |917.

Patented June 10, i919.

HENRY F. BECHMAN, OF BATTLE CREEK, MICHIGAN, ASSIGNOR TO DUPLEX PRINTINGPRESS COMPANY, 0F BATTLE CREEK, MICHIGAN, A CORPORATION 0F MICHIGAN.

BLANKET-CYLINDER FOR PRINTING-PRESSES.

Specification of Letters Patent.

Patented June 10, 1919.

Original application 1ed. April 2G, 1916, Serial No. 93,695. Divided andthis application led J une 13, 1917..r

Serial No.

To all yw hom it may concern Be it known that I, HENRY F. Bnor-IMAN, acitizen of the United States, residing at Battle Creek, in the county ofCalhoun and vState of Michigan, have invented certain new and usefulImprovements in Blanket- Cylinders for Printing-Presses; and I herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, which formpart of this specification.

This invention is a novel improvement in printing machinery and hasparticular reference to the blanket or impression cylinders of rotarypresses; and its object is to practically obviate the spring7 of suchcylinders, which has heretofore been a source of great trouble in highspeed rotary presses, and also to locate the blanket adjusting devicesexterior to the cylinder bearings and gears, so that they will bereadily accessible from the outside of the side or end frames orbearings in which the cylinder is journaled, instead of said deviceshaving to be located and operated intermediate the ends of the cylinderand the side frames or bearings in which the cylinder trunnions aremounted. This construction enables the press as a whole to be narrowedin width orshortened in length, according to whether the cylinders arearranged transversely or longitudinally thereof.

The present invention isa division of myy application Serial No. 93,695filed April 26, 1916, for cylinders and plate clamping devices forrotary printing presses.

In the present invention I dispense with any cylinder trunnions orshafts, and journal the ends of the impression cylinder directly in thebearings, and this enables me to arrange the adjusting devices for theblankets at the end of the cylinder and'out side of the bearings orframe.

The novel features of the invention will be hereinafter explained indetail with reference to the accompanying drawings so that othersskilled in the art will be able to readily adopt and use the same; andthe essential features and novel combinations of parts for whichprotection is desired are set forth in the claims following saiddescription.

In said drawings:

Figure 1 is a detail side elevation of part of a press, showing aprinting couple com prising a plate and impression cylinder j ournaledin bearings therein.

F ig. 2 is an enlarged end elevation of the impression cylinder, thecylinder gear being partly broken away.

Fig. 3 is an enlarged vertical section of part of the impressioncylinder on line 3-3 F 2.

The plate cylinder 1 and impression cylinder 5 may be in general similarto the cylinders now in use, with the important exception that the usualsupporting shaft or supporting trunnions are dispensed with, and insteadeach cylinder is made long enough to practically extend through the sideframes of the press. The ends of the cylinders form its journals and maybe of the same diameter as the body thereof, but are preferably slightlyreduced. This enables the press to be narrowed or shortened because ofthe absence of end trunnions or shafts on the cylinders; and alsoenables the devices by which the plate clamps or the blanket adjustingdevices are operated to be extended directly through the ends of thecylinder and bearings to the outside of the press frame. l

As shown the end of the plate cylinder 1 is slightly reduced, and isjournaled in a box 2. The ends of the impression cylinder A5 are alsoslightly reduced, and journaled be constructed in general like theordinary .Y

impression cylinders exce t that it is trunnionless, or of substantia lyuniform diameter throughout, preferably having its ends slightly reducedto form trunnions as at 5a where they are journaled in boxes 2, the endsof the cylinder projecting through such boxes.

Said cylinder 5 is provided with the usual openings or slots 5b in whichare mounted the shafts 7 and 8 to which the ends ofthe blankets ortympans are attached as usual. Owing to the novel construction of theimpression cylinder the shafts 7 and 8 can extend' directly straight outthrough the large journals of the cylinder to the outer end thereof andcan be manipulated from the outside of the press frame. On one end ofcylinder 5 a gear 6 is attached7 and the outer ends of the shafts 7 and8 may be journaled inA openings inthe web 6a of the gear 6,y

which may be fastened to the end ofthe cylinder in any suitable manner,and is shown as secured thereto by bolts 6b.

The outer ends of the shafts 7 and 8 may be squared as at 7 a, 8a forengagement with a suitable wrench by which said shafts can be turned;and they may also be providedy with any suitable devices forlockingsu'ch shafts when adjusted; such as ratchets 7b, 8b, engaged bypawls 7, 8c.

The slots 5b in cylinder 5 may be staggered and the plates o-n the platecylinder bearing 0r frame and outer end of the cylinder; this feature isof great practical convenience to the pressman, and it enables the pressto be correspondingly narrowed in width or shortened in length(according to the disposition of theJ cylinders therein)vv as comparedwith the heretofore known cylin-` ders wherein the adjusting devices hadto be arranged adjacent the inner ends of the cylinder trunnions, vandto the ,inside ofthe bearings and frame.

What I claim is: y y

1. In combination,A an impression cylinder having an end journal, andblanket adjusting devices extending through the cylinder journal landaccessible fromy the outer end of the journal.

2. In' combination with a press frame and bearings;y of an impressioncylinder having an end journal of substantially the same diameter as thebody of the cylinder; and blanket adjusting devices i extending Vthroughthe journal of the cylinder and the bearing, and accessiblev fromytheouter side of the bearing and frame.

3. In combination, an impression cylinder having end journals; and ablanket adjustino' shaft extending straightoutward throug the ends ofthe cylinder and the journal thereof and accessible from the outer sideof the bearing.

4L. In a. printing press, a trunnionless impression cylinder having abody and journals of substantially the same diameter and a blanketadjusting shaft extending outward through the end of the cylinder and ajournaly thereof and eccentric tol the axis thereof and accessible fromthe outer end of the journal.

5. In combination with a press frame and bearings; of; an impressioncylinder having a body andend journalsall of. substantially the samediameter and. j ournaled inY and extending through said bearings; andblanket v adjusting devices extending through one end of the cylinderand its journal and the bearbearingy and frame. f

6. In combinationvgja trunnionless impression cylinder having: abody andend journals all of substantiallylthe same diameter;

ing, and accessiblefromthe outer side of thel bearings in which thecylinderisjournaled;.

the journals of the cylinder extending through said bearings; a drivinggearon one end journal of the cylinder; and blanket ladjusting devicesextending through the gearv end journal of the cylinderVV andaccessible. from the outer side of they bearing.

7. In combination, atrunnionless impression cylinder having-Ya bodyandend journals all of substantially uniform diameter; bearings on theframe in which the cylinder:

is journaled, -a gearfattaclied to one-journal of the cylinder outsidethe bearing; and al y pair of parallel blanketadjusting shafts extendingthrough one journal of the cylinder eccentric to theaxis thereof andthrough its bearing and said gearpan'd accessible from the outer sideofthe press frame, substantially as. described.

In` testimony that I claim the foregoing as my own, I aix my signature'.HENRY IVBECHMAN..

Copies of this patent'may be obtained for five cents each, byaddressing; the` Commissioner of Patents, Y Washington, D. C. H

